Piston clearance

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I'm getting ready to put my new pistons in. Ross says MINIMUM clearance for norm asp street is 0.004", 0.005" for RR and drags. This particular alloy has a low or no silicon content I think (2618 T61). They also note that many engine builders set their clearances to their own preferences. What are others out there doing? And does anyone use a feeler guage to check their piston clearance? I just heard about this. Is this an acceptable way to check this clearance?

8/2/037:44 PM

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